/* =========================================================
   Page: /instructions/ — 使用说明与条款
   Scope: .page-disclaimer
   ========================================================= */

.page-disclaimer {
  background: var(--color-bg);
  color: var(--color-text-dark);
}

/* ---------- Hero ---------- */

.page-disclaimer__hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-height) + var(--space-4)) var(--space-2) var(--space-5);
  background:
    linear-gradient(135deg, rgba(57, 255, 20, 0.06) 0%, transparent 42%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border-dark);
}

.page-disclaimer__breadcrumb {
  max-width: var(--content-narrow);
  margin: 0 auto var(--space-4);
}

.page-disclaimer__hero-inner {
  position: relative;
  max-width: var(--content-narrow);
  margin: 0 auto;
}

.page-disclaimer__hero-copy {
  position: relative;
  z-index: 1;
  max-width: 42rem;
}

.page-disclaimer__kicker {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-disclaimer__kicker::before {
  content: "";
  display: block;
  width: 2rem;
  height: 1px;
  background: var(--color-primary);
}

.page-disclaimer__hero-copy h1 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2.25rem, 7vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-disclaimer__lead {
  max-width: 34rem;
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-text-dim);
}

.page-disclaimer__hero-svg {
  position: absolute;
  right: 0;
  bottom: -0.75rem;
  width: 5rem;
  height: 6.67rem;
  color: rgba(57, 255, 20, 0.16);
  pointer-events: none;
}

/* ---------- Figure ---------- */

.page-disclaimer__figureband {
  padding: var(--space-5) var(--space-2) 0;
}

.page-disclaimer__figure {
  max-width: var(--content-narrow);
  margin: 0 auto;
  position: relative;
}

.page-disclaimer__figure-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
  clip-path: polygon(0.75% 0%, 100% 0%, 99.25% 100%, 0% 100%);
}

/* ---------- Sections ---------- */

.page-disclaimer__body {
  padding-top: var(--space-5);
}

.page-disclaimer__section {
  padding: var(--space-5) var(--space-2);
  border-top: 1px solid var(--color-border-dark);
  scroll-margin-top: calc(var(--header-height) + var(--space-2));
}

.page-disclaimer__section--deep {
  background: var(--color-bg-deep);
}

.page-disclaimer__section--light {
  background: var(--color-bg-light);
  color: var(--color-text-light);
  border-top-color: var(--color-border-light);
}

.page-disclaimer__section-title {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  color: var(--color-text-dark);
}

.page-disclaimer__section-title--on-light {
  color: var(--color-text-light);
}

.page-disclaimer__section-bar {
  display: block;
  flex: none;
  width: 0.3125rem;
  min-height: 1.25em;
  margin-top: 0.2em;
  background: var(--color-primary);
}

.page-disclaimer__section-bar--orange {
  background: var(--color-secondary);
}

.page-disclaimer__section-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.3;
  color: var(--color-text-dim);
  margin-top: 0.35em;
  letter-spacing: 0.08em;
}

.page-disclaimer__section--light .page-disclaimer__section-num {
  color: var(--color-secondary);
}

/* ---------- Prose & links ---------- */

.page-disclaimer__section .prose a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(0, 229, 255, 0.4);
  text-underline-offset: 0.18em;
  transition: text-decoration-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.page-disclaimer__section .prose a:hover {
  color: var(--color-primary);
  text-decoration-color: var(--color-primary);
}

.page-disclaimer__section--light .prose {
  color: var(--color-text-light);
}

.page-disclaimer__section--light .prose a {
  color: var(--color-text-light);
  text-decoration-thickness: 2px;
  text-decoration-color: var(--color-secondary);
  text-underline-offset: 0.18em;
  transition: text-decoration-color var(--duration) var(--ease), background-color var(--duration) var(--ease);
}

.page-disclaimer__section--light .prose a:hover {
  text-decoration-color: var(--color-secondary);
  background-color: rgba(255, 107, 53, 0.14);
}

/* ---------- Highlight ---------- */

.page-disclaimer__mark {
  background: transparent;
  cursor: default;
  box-shadow: inset 0 -0.18em 0 var(--color-primary);
  transition: box-shadow var(--duration) var(--ease), color var(--duration) var(--ease);
}

.page-disclaimer__mark:hover {
  box-shadow: inset 0 -1.1em 0 var(--color-primary);
  color: var(--color-bg);
}

.page-disclaimer__section--light .page-disclaimer__mark {
  box-shadow: inset 0 -0.18em 0 var(--color-secondary);
}

.page-disclaimer__section--light .page-disclaimer__mark:hover {
  box-shadow: inset 0 -1.1em 0 var(--color-secondary);
  color: var(--color-text-light);
}

/* ---------- Datastrip ---------- */

.page-disclaimer__datastrip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: var(--space-3) 0;
  background: var(--color-border-dark);
  border: 1px solid var(--color-border-dark);
}

.page-disclaimer__datapoint {
  background: var(--color-bg-deep);
  padding: var(--space-2);
}

.page-disclaimer__datavalue {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-primary);
}

.page-disclaimer__datalabel {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--color-text-dim);
}

/* ---------- Usage lists ---------- */

.page-disclaimer__usagelist {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.page-disclaimer__usage-block {
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border-dark);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-3);
}

.page-disclaimer__usage-block--forbidden {
  border-left-color: var(--color-secondary);
}

.page-disclaimer__usage-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.35;
  color: var(--color-text-dark);
}

.page-disclaimer__usage-icon {
  flex: none;
  width: 1.125rem;
  height: 1.125rem;
  color: var(--color-primary);
}

.page-disclaimer__usage-block--forbidden .page-disclaimer__usage-icon {
  color: var(--color-secondary);
}

.page-disclaimer__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer__list li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-disclaimer__list li:last-child {
  margin-bottom: 0;
}

.page-disclaimer__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-primary);
  transform: rotate(45deg);
}

.page-disclaimer__list--forbidden li::before {
  background: var(--color-secondary);
}

.page-disclaimer__note {
  margin-top: var(--space-4);
}

/* ---------- Desktop enhancements ---------- */

@media (min-width: 768px) {
  .page-disclaimer__hero {
    padding-bottom: var(--space-6);
  }

  .page-disclaimer__hero-svg {
    top: 0;
    right: 0;
    bottom: auto;
    width: 9rem;
    height: 12rem;
    color: rgba(57, 255, 20, 0.14);
  }

  .page-disclaimer__hero-copy {
    max-width: 36rem;
  }

  .page-disclaimer__section {
    padding: var(--space-6) var(--space-2);
  }

  .page-disclaimer__section-title {
    font-size: clamp(1.875rem, 3vw, 2.625rem);
  }

  .page-disclaimer__usagelist {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .page-disclaimer__datastrip {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-disclaimer__datavalue {
    font-size: 1.625rem;
  }
}